Previous investigations into gender gaps in surgical training have relied largely on summary-level data captured at a single moment: graduation. Those studies consistently found that female trainees finish residency with lower Accreditation Council for Graduate Medical Education (ACGME) case totals and report lower intraoperative autonomy than male colleagues. But such snapshots could not answer a critical question that has vexed educators for years—do these disparities exist from day one, or do they develop over the five-year arc of surgical apprenticeship? The new research, published in Global Surgical Education, the journal of the Association for Surgical Education, set out to trace exactly when and how these differences emerge.

The scale of the dataset is what sets the study apart. Researchers analyzed 569,761 individual ACGME case log entries generated by residents at six programs, matching them to 415 attending surgeons, of whom 141, or 34 percent, were women. Crucially, the team obtained resident and attending gender through self-reported data from the SIMPL platform, a smartphone-based surgical performance feedback system, since gender is not recorded in standard ACGME case logs. Nearly half of the residents, 234 of 473, were women. The programs themselves reflected national demographics, with female resident representation ranging from 42 to 58 percent across sites.

Each case entry captured the resident’s post-graduate year, the operative role recorded, and the identity and gender of both trainee and attending surgeon. ACGME case roles fall into distinct categories: first assistant, in which the resident helps another surgeon; surgeon junior and surgeon chief, which together constitute primary surgeon roles; and teaching assistant, in which a chief resident supervises a junior resident through an operation. These designations matter enormously. The American Board of Surgery and program clinical competency committees use case log data to judge whether residents are ready to graduate and to practice independently.

The headline finding was stark. On average, female residents logged 8.1 percent fewer total cases than male residents—1,153 versus 1,255, a statistically significant difference. Yet the more revealing pattern emerged when the researchers stratified cases by operative role and training year. There were no meaningful differences between male and female residents in how often they logged cases as primary surgeon. The divergence appeared instead in first assistant entries, and it widened dramatically with seniority. Female residents were 1.57 times more likely than male peers to log a case as first assistant in their third year of training, with an odds ratio of 1.57 and a 95 percent confidence interval of 1.14 to 2.16. By the fourth year that odds ratio climbed to 2.76, and by the fifth and final year it reached 3.72—meaning senior female residents were nearly four times as likely to record themselves in the assisting role.

The temporal pattern is what makes the finding so consequential. In the early years of residency, serving as first assistant is expected and appropriate; PGY1 residents in the dataset logged 15,047 first assistant cases, a figure that fell to just 212 among PGY5 residents as trainees assumed the surgeon’s role. But a substantial minority of residents continued logging first assistant cases deep into senior years—52 percent of PGY3 residents, 33 percent of PGY4 residents, and 14 percent of PGY5 residents did so. Among this persistent group, women were markedly overrepresented. The most frequently logged first assistant cases included laparoscopic cholecystectomy, laparoscopic appendectomy, inguinal hernia repair, ventral hernia repair, and colectomy—core general surgery procedures in which senior residents should be operating with increasing independence.

The study also examined whether the gender of the attending surgeon shaped these patterns, a question no prior case log analysis had been able to address. Overall, cases performed with female faculty were less likely to be logged as first assistant, with an odds ratio of 0.79. Yet among senior residents the association reversed: PGY4 residents operating with a female attending were 1.68 times more likely to log first assistant cases, and PGY5 residents were 2.46 times more likely. Notably, the researchers found no significant differences between gender-concordant and gender-discordant resident-attending pairings, suggesting that simple matching of trainee and faculty gender does not explain the observed trends. The authors caution that the mechanisms behind these attending-level effects—whether they reflect differences in teaching style, entrustment behavior, or documentation habits—remain outside the scope of the current data and merit dedicated investigation.

Why would female senior residents log more first assistant cases? The authors emphasize that the dataset cannot establish causation, and they lay out competing explanations that likely operate in combination. Extrinsic factors could include faculty perceptions, institutional culture, or the timing of cases within the academic year, while intrinsic factors might involve self-perception, confidence, and how residents understand the role definitions themselves. Teaching assistant and first assistant categories lack the strict criteria, such as post-graduate year level, that govern primary surgeon designations, making them more vulnerable to misinterpretation. Indeed, since primary surgeon cases showed no gender difference at all, the researchers suggest that some of the disparity may stem from inconsistent application of logging guidelines rather than unequal operative opportunity. At the same time, they are careful to note the well-documented literature on gender-based discrimination in surgical training, acknowledging that the uneven distribution of operative roles may reflect faculty bias or structural inequities that limit women’s chances to operate as lead surgeon.

The study carries important limitations that the authors confront directly. The data contain no information about case complexity beyond procedural codes, which are known to be inaccurately recorded, and the analysis excluded residents whose gender data was missing or reported as other or prefer not to answer, leaving the experiences of non-binary trainees unexamined. Race and ethnicity data were absent entirely, a significant gap for any work on equity. The sample was also confined to large university-based programs, which may limit generalizability, although the consistency of the trends with national-level data lends credibility to the findings. One resident, for example, logged an exploratory laparotomy as a teaching assistant case during the first year—a clear misclassification that illustrates the noise inherent in self-reported logs, even as subtler errors likely permeate the data.

The implications reach well beyond the operating room. As surgical education shifts toward competency-based training and Entrustable Professional Activities, understanding how different trainee subpopulations use measurement tools becomes essential to interpreting quantitative data fairly. The authors call for future research pairing ACGME case logs with faculty EPA assessments and resident self-evaluations, alongside qualitative studies of how residents actually decide which role to record. In the meantime, they offer a pragmatic recommendation: individual programs can apply the same analytical methods to their own case log data, monitoring for disparities by gender, PGY level, and even rotation site in real time. Such local surveillance, the researchers argue, could allow program leadership to identify senior residents who continue logging first assistant cases, clarify the correct application of role definitions, and address any underlying inequities before they calcify into a training record—and perhaps a career trajectory—that understates a surgeon’s true capabilities.

Subject of Research: Gender disparities in operative case logging and surgical training roles among general surgery residents

Article Title: Gender disparities among general surgery residents’ ACGME case logs develop over the course of training

Article References: Gender disparities among general surgery residents’ ACGME case logs develop over the course of training. (n.d.). https://doi.org/10.1007/s44186-026-00575-7

Image Credits: AI Generated

DOI: 10.1007/s44186-026-00575-7

Keywords: general surgery, residency training, ACGME case logs, gender disparities, operative autonomy, surgical education, first assistant, attending surgeon gender, SIMPL, graduate medical education, operative experience, competency-based training